They really are having a dumb, dumber, and dumbest competition.
Aditi/Neha keeps proving herself away and Kabir keeps letting her get away with it. Guess he is scared to trust /believe what's in front of his eyes. Maybe from his perspective he does not understand why she would come back as Neha and not Aditi and how she could have survived the accident. As for Aditi being mad at him... it could be as simple as him not going with her the day of the accident. But, he does want her back even if she is angry with him. Dude is obviously madly in love with Aditi... I hope bechara figures it out soon and tortures her into admitting it.
If Kabir is in denial then Aditi is in mega-denial. She is confused about what is the truth - the past or the present. She needs to see that the past lives in the present. Kabir without her is a different man. A sober serious unhappy man. A man who remembers everything about his wife. He knows how she dries her hair, makes breakfast, her superstitions, and lines he marofied to her... that's cute to the point of creepy! The past is imprinted on his soul and is screaming out to her - if only she pays it an ounce of attention. She is so focused on coming up with explanations about how she knows Aditi's habits, she is not seeing why it is that she is having to explain - because Kabir knows his Aditi.
The irony is that Pia & Gia turn out to be the smartest characters of the episode!